Unable to update

For first post, please answer the questions below!

Describe your issue in detail

once updated, unable to access files.

What version of Cells are you using?

4.2.7 | any version above this breaks

What is the server OS? Database name/version? Browser name or mobile device description (if issue appears client-side)?

Ubuntu

What steps have you taken to resolve this issue already?

upgrading and testing in browser.
The following image is what’s seen in the console when browsing the files

Logs from the server side would help.
Did you notice any error log when restarting the server after update ?